Actually test Rails 6.0.0, 7.0.0, 7.1.0, and released version of 8.0.0.

Author: johnnyshields

gemfiles/rails-6.0.gemfile

@@ -1,11 +1,11 @@
 # rubocop:todo all
 source 'https://rubygems.org'
 
-gem 'actionpack', '~> 6.0'
-gem 'activemodel', '~> 6.0'
+gem 'actionpack', '~> 6.0.0'
+gem 'activemodel', '~> 6.0.0'
 
 group :test do
-  gem 'activejob', '~> 6.0'
+  gem 'activejob', '~> 6.0.0'
 end
 
 gemspec path: '..'

gemfiles/rails-6.1.gemfile

@@ -1,11 +1,11 @@
 # rubocop:todo all
 source 'https://rubygems.org'
 
-gem 'actionpack', '~> 6.1'
-gem 'activemodel', '~> 6.1'
+gem 'actionpack', '~> 6.1.0'
+gem 'activemodel', '~> 6.1.0'
 
 group :test do
-  gem 'activejob', '~> 6.1'
+  gem 'activejob', '~> 6.1.0'
 end
 gemspec path: '..'
 

gemfiles/rails-7.0.gemfile

@@ -1,11 +1,15 @@
 # rubocop:todo all
 source 'https://rubygems.org'
 
-gem 'actionpack', '~> 7.0'
-gem 'activemodel', '~> 7.0'
+# These dependencies must be explicitly declared Ruby 3.4+
+gem 'bigdecimal'
+gem 'mutex_m'
+
+gem 'actionpack', '~> 7.0.0'
+gem 'activemodel', '~> 7.0.0'
 
 group :test do
-  gem 'activejob', '~> 7.0'
+  gem 'activejob', '~> 7.0.0'
 end
 gemspec path: '..'
 

gemfiles/rails-7.1.gemfile

@@ -1,11 +1,11 @@
 # rubocop:todo all
 source 'https://rubygems.org'
 
-gem 'actionpack', '~> 7.1'
-gem 'activemodel', '~> 7.1'
+gem 'actionpack', '~> 7.1.0'
+gem 'activemodel', '~> 7.1.0'
 
 group :test do
-  gem 'activejob', '~> 7.1'
+  gem 'activejob', '~> 7.1.0'
 end
 gemspec path: '..'
 

gemfiles/rails-7.2.gemfile

@@ -1,11 +1,11 @@
 # rubocop:todo all
 source 'https://rubygems.org'
 
-gem 'actionpack', '~> 7.2'
-gem 'activemodel', '~> 7.2'
+gem 'actionpack', '~> 7.2.0'
+gem 'activemodel', '~> 7.2.0'
 
 group :test do
-  gem 'activejob', '~> 7.2'
+  gem 'activejob', '~> 7.2.0'
 end
 gemspec path: '..'
 

gemfiles/rails-8.0.gemfile

@@ -1,11 +1,11 @@
 # rubocop:todo all
 source 'https://rubygems.org'
 
-gem 'actionpack', '8.0.0.rc2'
-gem 'activemodel', '8.0.0.rc2'
+gem 'actionpack', '~> 8.0.0'
+gem 'activemodel', '~> 8.0.0'
 
 group :test do
-  gem 'activejob', '8.0.0.rc2'
+  gem 'activejob', '~> 8.0.0'
 end
 gemspec path: '..'